At first, it looks like a fairly simple Instagram post from Buckingham Palace promoting the sale of the 28-year-old’s official royal wedding china. But upon closer inspection of the caption, we can see they haven’t got her name quite right.

“Available only till Saturday! This exclusive mug issued in commemoration of the wedding of HRH Princess Beatrice of York and Mr Jack Brooksbank is now available for purchase by following the link in the description,” the caption read.

Yep, they’ve managed to confuse the bride with her older sister, Princess Beatrice.

The post was soon taken down and replaced once the (surely embarrassed) social media manager noticed their error – but not before screenshots were taken by News.com.au.